$(function() {

	// Make the last div in each row have no right margin.
	$(".book:nth-child(2n+1)").css("margin-right","0px");
	
	
	// Make each div as tall as the tallest div
	var maxHeight = 150;
	var category = $(".category");
		
	category
		.each(function() {
			if ($(this).height() > maxHeight) { maxHeight = $(this).height(); }
			
		})
		
		.height(maxHeight)
			


});